Details
| Original language | English |
|---|---|
| Pages (from-to) | 4253-4269 |
| Number of pages | 17 |
| Journal | Acta materialia |
| Volume | 55 |
| Issue number | 13 |
| Publication status | Published - Aug 2007 |
| Externally published | Yes |
Abstract
The effect of magnetic field on the martensitic phase transformation in Ni2MnGa single crystals was investigated under compression. Reversible and one-way stress-assisted field-induced phase transformations were observed under low field magnitudes. The total work output levels achieved during reversible stress-assisted field-induced phase transformation are similar to that attained using field-induced martensite reorientation in NiMnGa magnetic shape memory alloys (MSMAs). However, the actuation stress levels are an order of magnitude higher. Possible magneto-microstructural mechanisms and necessary magnetic and mechanical conditions to accomplish field-induced phase transformation are discussed. A thermodynamical description is introduced to understand magnetic energy contributions to trigger the phase transformation. Materials design and selection guidelines are proposed to search for this new mechanism in other ferromagnetic materials that undergo thermoelastic martensitic phase transformation. The present work output levels achieved in the Ni2MnGa MSMA and the possibility of further increase place MSMAs above many currently available high frequency active materials.
Keywords
- Ferromagnetic materials, Ferromagnetic shape memory alloys, Magnetic-field-induced phase transformation, Magnetic-field-induced strain, Martensitic phase transformation
ASJC Scopus subject areas
- Materials Science(all)
- Electronic, Optical and Magnetic Materials
- Materials Science(all)
- Ceramics and Composites
- Materials Science(all)
- Polymers and Plastics
- Materials Science(all)
- Metals and Alloys
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In: Acta materialia, Vol. 55, No. 13, 08.2007, p. 4253-4269.
Research output: Contribution to journal › Article › Research › peer review
}
TY - JOUR
T1 - On the stress-assisted magnetic-field-induced phase transformation in Ni2MnGa ferromagnetic shape memory alloys
AU - Karaca, H. E.
AU - Karaman, I.
AU - Basaran, B.
AU - Lagoudas, D. C.
AU - Chumlyakov, Y. I.
AU - Maier, H. J.
N1 - Funding Information: This work was supported by US Army Research Office Contract no. W911NF-06-1-0319, US Civilian Research and Development Foundation Grant No. RUE1-2690-TO-05 and the Deutsche Forschungsgemeinschaft.
PY - 2007/8
Y1 - 2007/8
N2 - The effect of magnetic field on the martensitic phase transformation in Ni2MnGa single crystals was investigated under compression. Reversible and one-way stress-assisted field-induced phase transformations were observed under low field magnitudes. The total work output levels achieved during reversible stress-assisted field-induced phase transformation are similar to that attained using field-induced martensite reorientation in NiMnGa magnetic shape memory alloys (MSMAs). However, the actuation stress levels are an order of magnitude higher. Possible magneto-microstructural mechanisms and necessary magnetic and mechanical conditions to accomplish field-induced phase transformation are discussed. A thermodynamical description is introduced to understand magnetic energy contributions to trigger the phase transformation. Materials design and selection guidelines are proposed to search for this new mechanism in other ferromagnetic materials that undergo thermoelastic martensitic phase transformation. The present work output levels achieved in the Ni2MnGa MSMA and the possibility of further increase place MSMAs above many currently available high frequency active materials.
AB - The effect of magnetic field on the martensitic phase transformation in Ni2MnGa single crystals was investigated under compression. Reversible and one-way stress-assisted field-induced phase transformations were observed under low field magnitudes. The total work output levels achieved during reversible stress-assisted field-induced phase transformation are similar to that attained using field-induced martensite reorientation in NiMnGa magnetic shape memory alloys (MSMAs). However, the actuation stress levels are an order of magnitude higher. Possible magneto-microstructural mechanisms and necessary magnetic and mechanical conditions to accomplish field-induced phase transformation are discussed. A thermodynamical description is introduced to understand magnetic energy contributions to trigger the phase transformation. Materials design and selection guidelines are proposed to search for this new mechanism in other ferromagnetic materials that undergo thermoelastic martensitic phase transformation. The present work output levels achieved in the Ni2MnGa MSMA and the possibility of further increase place MSMAs above many currently available high frequency active materials.
KW - Ferromagnetic materials
KW - Ferromagnetic shape memory alloys
KW - Magnetic-field-induced phase transformation
KW - Magnetic-field-induced strain
KW - Martensitic phase transformation
UR - http://www.scopus.com/inward/record.url?scp=34250870096&partnerID=8YFLogxK
U2 - 10.1016/j.actamat.2007.03.025
DO - 10.1016/j.actamat.2007.03.025
M3 - Article
AN - SCOPUS:34250870096
VL - 55
SP - 4253
EP - 4269
JO - Acta materialia
JF - Acta materialia
SN - 1359-6454
IS - 13
ER -